Plant growth light



FIG. 1 is a front, right, and bottom perspective view of a plant growth light, showing my design.

FIG. 2 is a rear, left, and top perspective view thereof.

FIG. 3 is a front elevation view thereof.

FIG. 4 is a rear elevation view thereof.

FIG. 5 is a left side elevation view thereof.

FIG. 6 is a right side elevation view thereof.

FIG. 7 is a top plan view thereof.

FIG. 8 is a bottom plan view thereof.

FIG. 9 is a partial enlarged view of an area labeled 9 in FIG. 1 comprising a clip; and,

FIG. 10 is a partial enlarged view of an area labeled 10 in FIG. 2 comprising a light.

The broken lines shown in the drawings are included for the purpose of illustrating portions of the plant growth light that form no part of the claimed design. 

CLAIM The ornamental design for a plant growth light, as shown and described. 